<?php

namespace App\Http\Controllers\Frontdesk;

use App\Http\Controllers\Controller;
use App\Http\Controllers\Frontdesk\Concerns\ScopesToAccount;
use App\Models\Organization;
use App\Services\Billing\BillingClient;
use App\Services\Frontdesk\FrontdeskPermissions;
use App\Services\Frontdesk\PlanService;
use Illuminate\Http\RedirectResponse;
use Illuminate\Http\Request;
use Illuminate\Support\Carbon;
use Illuminate\View\View;

class ProController extends Controller
{
    use ScopesToAccount;

    public function index(Request $request, PlanService $plans): View
    {
        $organization = $this->organization($request);
        $canManage = app(FrontdeskPermissions::class)->isAdmin($this->member($request));
        $settings = $organization->settings ?? [];
        $expiresAt = ! empty($settings['plan_expires_at'])
            ? Carbon::parse($settings['plan_expires_at'])
            : null;
        $planKey = $plans->planKey($organization);

        return view('frontdesk.pro.index', [
            'organization' => $organization,
            'planKey' => $planKey,
            'isPro' => $planKey === 'pro',
            'isEnterprise' => $planKey === 'enterprise',
            'hasPaidPlan' => $plans->hasPaidPlan($organization),
            'canManage' => $canManage,
            'proPriceMinor' => $plans->proPriceMinor(),
            'prepaidMonths' => (array) config('frontdesk.prepaid_months', [6, 12, 24]),
            'currency' => (string) config('billing.currency', 'GHS'),
            'planExpiresAt' => $expiresAt,
            'salesUrl' => ladill_platform_url('contact-sales'),
        ]);
    }

    public function subscribe(Request $request, PlanService $plans, BillingClient $billing): RedirectResponse
    {
        $this->authorizeAbility($request, 'settings.manage');
        $organization = $this->organization($request);

        if ($plans->hasPaidPlan($organization)) {
            return redirect()->route('frontdesk.pro.index')
                ->with('success', 'Your organization already has an active paid plan.');
        }

        if ($plans->isEnterprise($organization)) {
            return redirect()->route('frontdesk.pro.index')
                ->with('success', 'Your organization is on Frontdesk Enterprise.');
        }

        return $this->chargeMonthlyWallet(
            $organization,
            $billing,
            $plans->proPriceMinor(),
            'pro',
            'frontdesk_pro',
            'frontdesk-pro-'.$organization->id.'-'.now()->format('Y-m-d-His'),
            'Ladill Frontdesk Pro — monthly subscription',
            'Welcome to Frontdesk Pro — active for one month.',
        );
    }

    public function subscribePrepaid(Request $request, PlanService $plans, BillingClient $billing): RedirectResponse
    {
        $this->authorizeAbility($request, 'settings.manage');
        $validated = $request->validate([
            'plan' => ['required', 'in:pro'],
            'months' => ['required', 'integer', 'in:6,12,24'],
        ]);

        $organization = $this->organization($request);
        if ($plans->hasPaidPlan($organization) || $plans->isEnterprise($organization)) {
            return redirect()->route('frontdesk.pro.index')
                ->with('success', 'Your organization already has an active plan.');
        }

        $months = (int) $validated['months'];
        $amountMinor = $plans->proPriceMinor() * $months;

        try {
            $checkout = $billing->initiatePlanCheckout(
                $organization->owner_ref,
                'pro',
                $months,
                $amountMinor,
                route('frontdesk.pro.paystack.callback'),
                ['organization_id' => $organization->id],
            );
        } catch (\Throwable) {
            return redirect()->route('frontdesk.pro.index')
                ->with('error', 'Could not start Paystack checkout. Please try again.');
        }

        $url = trim((string) ($checkout['checkout_url'] ?? ''));
        if ($url === '') {
            return redirect()->route('frontdesk.pro.index')
                ->with('error', 'Paystack did not return a checkout URL.');
        }

        return redirect()->away($url);
    }

    public function paystackCallback(Request $request, BillingClient $billing, PlanService $plans): RedirectResponse
    {
        $reference = (string) $request->query('reference', '');
        if ($reference === '') {
            return redirect()->route('frontdesk.pro.index')->with('error', 'Missing payment reference.');
        }

        try {
            $result = $billing->verifyPlanCheckout($reference);
        } catch (\Throwable) {
            return redirect()->route('frontdesk.pro.index')
                ->with('error', 'Could not verify payment. Contact support with reference: '.$reference);
        }

        if (! ($result['paid'] ?? false)) {
            return redirect()->route('frontdesk.pro.index')
                ->with('error', 'Payment was not completed.');
        }

        $metadata = (array) ($result['metadata'] ?? []);
        $organization = Organization::query()->find((int) ($metadata['organization_id'] ?? 0));
        if (! $organization) {
            return redirect()->route('frontdesk.pro.index')
                ->with('error', 'Organization not found for this payment.');
        }

        $this->authorizeAbility($request, 'settings.manage');
        if ($this->organization($request)->id !== $organization->id) {
            abort(403);
        }

        $months = (int) ($result['months'] ?? 0);
        $this->activatePrepaidPlan($organization, 'pro', $months);

        return redirect()->route('frontdesk.pro.index')
            ->with('success', "Frontdesk Pro is active for {$months} months.");
    }

    private function chargeMonthlyWallet(
        Organization $organization,
        BillingClient $billing,
        int $priceMinor,
        string $plan,
        string $billingSource,
        string $reference,
        string $description,
        string $successMessage,
    ): RedirectResponse {
        try {
            if (! $billing->canAfford($organization->owner_ref, $priceMinor)) {
                return redirect()->route('frontdesk.pro.index')
                    ->with('error', 'Insufficient wallet balance. Top up your Ladill wallet to upgrade.');
            }

            $charged = $billing->debit(
                $organization->owner_ref,
                $priceMinor,
                $billingSource,
                $reference,
                $description,
            );
        } catch (\Throwable) {
            return redirect()->route('frontdesk.pro.index')
                ->with('error', 'Could not process upgrade. Please try again.');
        }

        if (! $charged) {
            return redirect()->route('frontdesk.pro.index')
                ->with('error', 'Insufficient wallet balance. Top up your Ladill wallet to upgrade.');
        }

        $settings = $organization->settings ?? [];
        $settings['plan'] = $plan;
        $settings['auto_renew'] = true;
        $settings['billing_method'] = 'wallet_monthly';
        $settings['plan_expires_at'] = now()
            ->addDays((int) config('frontdesk.pro.period_days', 30))
            ->toIso8601String();
        unset($settings['plan_renewal_error']);
        $organization->update(['settings' => $settings]);

        return redirect()->route('frontdesk.pro.index')->with('success', $successMessage);
    }

    private function activatePrepaidPlan(Organization $organization, string $plan, int $months): void
    {
        $settings = $organization->settings ?? [];
        $settings['plan'] = $plan;
        $settings['auto_renew'] = false;
        $settings['billing_method'] = 'paystack_prepaid';
        $settings['plan_expires_at'] = now()->addMonths($months)->toIso8601String();
        unset($settings['plan_renewal_error']);
        $organization->update(['settings' => $settings]);
    }
}